/*************************************************************************** * http.h * ***********************IMPORTANT NMAP LICENSE TERMS************************ * * * The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is * * also a registered trademark of Insecure.Com LLC. This program is free * * software; you may redistribute and/or modify it under the terms of the * * GNU General Public License as published by the Free Software * * Foundation; Version 2 with the clarifications and exceptions described * * below. This guarantees your right to use, modify, and redistribute * * this software under certain conditions. If you wish to embed Nmap * * technology into proprietary software, we sell alternative licenses * * (contact sales@insecure.com). Dozens of software vendors already * * license Nmap technology such as host discovery, port scanning, OS * * detection, version detection, and the Nmap Scripting Engine. * * * * Note that the GPL places important restrictions on "derived works", yet * * it does not provide a detailed definition of that term. To avoid * * misunderstandings, we interpret that term as broadly as copyright law * * allows. For example, we consider an application to constitute a * * "derivative work" for the purpose of this license if it does any of the * * following: * * o Integrates source code from Nmap * * o Reads or includes Nmap copyrighted data files, such as * * nmap-os-db or nmap-service-probes. * * o Executes Nmap and parses the results (as opposed to typical shell or * * execution-menu apps, which simply display raw Nmap output and so are * * not derivative works.) * * o Integrates/includes/aggregates Nmap into a proprietary executable * * installer, such as those produced by InstallShield. * * o Links to a library or executes a program that does any of the above * * * * The term "Nmap" should be taken to also include any portions or derived * * works of Nmap, as well as other software we distribute under this * * license such as Zenmap, Ncat, and Nping. This list is not exclusive, * * but is meant to clarify our interpretation of derived works with some * * common examples. Our interpretation applies only to Nmap--we don't * * speak for other people's GPL works. * * * * If you have any questions about the GPL licensing restrictions on using * * Nmap in non-GPL works, we would be happy to help. As mentioned above, * * we also offer alternative license to integrate Nmap into proprietary * * applications and appliances. These contracts have been sold to dozens * * of software vendors, and generally include a perpetual license as well * * as providing for priority support and updates. They also fund the * * continued development of Nmap. Please email sales@insecure.com for * * further information. * * * * As a special exception to the GPL terms, Insecure.Com LLC grants * * permission to link the code of this program with any version of the * * OpenSSL library which is distributed under a license identical to that * * listed in the included docs/licenses/OpenSSL.txt file, and distribute * * linked combinations including the two. You must obey the GNU GPL in all * * respects for all of the code used other than OpenSSL. If you modify * * this file, you may extend this exception to your version of the file, * * but you are not obligated to do so. * * * * If you received these files with a written license agreement or * * contract stating terms other than the terms above, then that * * alternative license agreement takes precedence over these comments. * * * * Source is provided to this software because we believe users have a * * right to know exactly what a program is going to do before they run it. * * This also allows you to audit the software for security holes (none * * have been found so far). * * * * Source code also allows you to port Nmap to new platforms, fix bugs, * * and add new features. You are highly encouraged to send your changes * * to nmap-dev@insecure.org for possible incorporation into the main * * distribution. By sending these changes to Fyodor or one of the * * Insecure.Org development mailing lists, or checking them into the Nmap * * source code repository, it is understood (unless you specify otherwise) * * that you are offering the Nmap Project (Insecure.Com LLC) the * * unlimited, non-exclusive right to reuse, modify, and relicense the * * code. Nmap will always be available Open Source, but this is important * * because the inability to relicense code has caused devastating problems * * for other Free Software projects (such as KDE and NASM). We also * * occasionally relicense the code to third parties as discussed above. * * If you wish to specify special license conditions of your * * contributions, just say so when you send them. * * * * This program is distributed in the hope that it will be useful, but * * WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * * General Public License v2.0 for more details at * * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file * * included with Nmap. * * * ***************************************************************************/ /* $Id$ */ #ifndef _HTTP_H #define _HTTP_H #include "ncat_config.h" #include "util.h" #include #include /* This is an abstraction over a socket (really a struct fdinfo) that provides rudimentary buffering. It is useful for the line-oriented parts of HTTP. */ struct socket_buffer { struct fdinfo fdn; char buffer[BUFSIZ]; char *p; char *end; }; void socket_buffer_init(struct socket_buffer *buf, int sd); int socket_buffer_read(struct socket_buffer *buf, char *out, size_t size); char *socket_buffer_readline(struct socket_buffer *buf, size_t *n, size_t maxlen); int socket_buffer_readcount(struct socket_buffer *buf, char *out, size_t size); char *socket_buffer_remainder(struct socket_buffer *buf, size_t *len); /* A broken-down URI as defined in RFC 3986, except that the query and fragment parts are included in the path. */ struct uri { char *scheme; char *host; int port; char *path; }; void uri_init(struct uri *uri); void uri_free(struct uri *uri); struct uri *uri_parse(struct uri *uri, const char *uri_s); struct uri *uri_parse_authority(struct uri *uri, const char *authority); enum http_version { HTTP_09, HTTP_10, HTTP_11, HTTP_UNKNOWN, }; struct http_header { char *name; char *value; struct http_header *next; }; struct http_request { char *method; struct uri uri; enum http_version version; struct http_header *header; unsigned long content_length; unsigned long bytes_transferred; }; struct http_response { enum http_version version; int code; char *phrase; struct http_header *header; unsigned long content_length; unsigned long bytes_transferred; }; void http_header_free(struct http_header *header); char *http_header_get(const struct http_header *header, const char *name); const struct http_header *http_header_next(const struct http_header *header, const struct http_header *p, const char *name); char *http_header_get_first(const struct http_header *header, const char *name); struct http_header *http_header_set(struct http_header *header, const char *name, const char *value); struct http_header *http_header_remove(struct http_header *header, const char *name); int http_header_remove_hop_by_hop(struct http_header **header); char *http_header_to_string(const struct http_header *header, size_t *n); void http_request_init(struct http_request *request); void http_request_free(struct http_request *request); char *http_request_to_string(const struct http_request *request, size_t *n); void http_response_init(struct http_response *response); void http_response_free(struct http_response *response); char *http_response_to_string(const struct http_response *response, size_t *n); int http_read_header(struct socket_buffer *buf, char **result); int http_parse_header(struct http_header **result, const char *header); int http_request_parse_header(struct http_request *request, const char *header); int http_response_parse_header(struct http_response *response, const char *header); int http_read_request_line(struct socket_buffer *buf, char **line); int http_parse_request_line(const char *line, struct http_request *request); int http_read_status_line(struct socket_buffer *buf, char **line); int http_parse_status_line(const char *line, struct http_response *response); int http_parse_status_line_code(const char *line); enum http_auth_scheme { AUTH_UNKNOWN, AUTH_BASIC, AUTH_DIGEST }; enum http_digest_algorithm { ALGORITHM_MD5, ALGORITHM_UNKNOWN }; enum http_digest_qop { QOP_NONE = 0, QOP_AUTH = 1 << 0, QOP_AUTH_INT = 1 << 1 }; struct http_challenge { enum http_auth_scheme scheme; char *realm; struct { char *nonce; char *opaque; enum http_digest_algorithm algorithm; /* A bit mask of supported qop values ("auth", "auth-int", etc.). */ unsigned char qop; } digest; }; struct http_credentials { enum http_auth_scheme scheme; union { char *basic; struct { char *username; char *realm; char *nonce; char *uri; char *response; enum http_digest_algorithm algorithm; enum http_digest_qop qop; char *nc; char *cnonce; } digest; } u; }; void http_challenge_init(struct http_challenge *challenge); void http_challenge_free(struct http_challenge *challenge); struct http_challenge *http_header_get_proxy_challenge(const struct http_header *header, struct http_challenge *challenge); void http_credentials_init_basic(struct http_credentials *credentials); void http_credentials_init_digest(struct http_credentials *credentials); void http_credentials_free(struct http_credentials *credentials); struct http_credentials *http_header_get_proxy_credentials(const struct http_header *header, struct http_credentials *credentials); #if HAVE_HTTP_DIGEST /* Initialize the server secret used in generating nonces. */ int http_digest_init_secret(void); int http_digest_nonce_time(const char *nonce, struct timeval *tv); /* Return a Proxy-Authenticate header. */ char *http_digest_proxy_authenticate(const char *realm, int stale); /* Return a Proxy-Authorization header answering the given challenge. */ char *http_digest_proxy_authorization(const struct http_challenge *challenge, const char *username, const char *password, const char *method, const char *uri); int http_digest_check_credentials(const char *username, const char *realm, const char *password, const char *method, const struct http_credentials *credentials); #endif #endif